/* Reset & Base */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-navy: #4C5D66;
  --color-beige: #F7D082;
  --color-off-white: #FBFAF8;
  --color-white: #ffffff;
  --color-text: #2c3a42;
  --color-text-muted: #6b7a82;
  --color-border: #e8e4df;
  --font-main: 'Montserrat', sans-serif;
  --max-width: 1040px;
  --radius-card: 15px;
  --radius-button: 5px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--color-off-white);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
nav {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo-img {
  height: 48px;
  width: auto;
}

.nav-cta {
  background: var(--color-navy);
  color: var(--color-white);
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-button);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.01em;
  transition: opacity 0.2s;
}

.nav-cta:hover {
  opacity: 0.85;
}

/* Main Content */
main {
  flex: 1;
}

/* Section Labels */
.section-label {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-beige);
  margin-bottom: 0.75rem;
}

/* Hero Section */
.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 1.5rem 4rem;
  display: flex;
  align-items: center;
  gap: 3rem;
}

.hero-content {
  flex: 1;
}

.hero-image {
  flex: 0 0 340px;
}

.hero-image img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--radius-card);
}

.hero-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-navy);
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 540px;
  margin-bottom: 2rem;
  line-height: 1.8;
}

/* Button */
.button {
  display: inline-block;
  background: var(--color-navy);
  color: var(--color-white);
  padding: 0.875rem 2rem;
  border-radius: var(--radius-button);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: opacity 0.2s;
  letter-spacing: 0.01em;
}

.button:hover {
  opacity: 0.85;
}

/* Problem Section */
.problem {
  background: var(--color-navy);
  padding: 5rem 1.5rem;
}

.problem-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.problem h2 {
  color: var(--color-white);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2.5rem;
  letter-spacing: -0.01em;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.problem-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-card);
  padding: 2rem;
}

.problem-icon {
  display: block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-beige);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.problem-card p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1rem;
  line-height: 1.7;
}

/* Guide Section */
.guide {
  padding: 5rem 1.5rem;
  background: var(--color-off-white);
}

.guide-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 3rem;
}

.guide-portrait {
  flex: 0 0 220px;
}

.guide-portrait img {
  width: 220px;
  height: 220px;
  object-fit: cover;
  border-radius: 50%;
}

.guide-content {
  flex: 1;
}

.guide-content h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 0.25rem;
  letter-spacing: -0.01em;
}

.guide-role {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.guide-content p {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.8;
}

/* Plan Section */
.plan {
  background: var(--color-white);
  padding: 5rem 1.5rem;
}

.plan-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.plan-inner h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.plan-desc {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 540px;
  margin: 0 auto 3rem;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  text-align: left;
}

.topic-card {
  background: var(--color-off-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 2rem;
}

.topic-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 0.5rem;
}

.topic-card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Episodes Section */
.episodes {
  background: var(--color-navy);
  padding: 5rem 0;
  overflow: hidden;
}

.episodes-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.episodes-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2.5rem;
}

.episodes-header h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
}

.episodes-header .section-label {
  color: var(--color-beige);
}

.swiper-nav {
  display: flex;
  gap: 0.5rem;
}

.swiper-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  background: transparent;
  color: var(--color-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s;
}

.swiper-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.swiper-btn.swiper-button-disabled {
  opacity: 0.3;
  cursor: default;
}

.swiper-btn.swiper-button-disabled:hover {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.3);
}

.episodes-swiper {
  overflow: visible;
}

.episodes-swiper .swiper-slide {
  height: auto;
}

.episode-card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.button-episode {
  display: inline-block;
  align-self: flex-start;
  margin-top: 1.25rem;
  flex-shrink: 0;
  padding: 0.5rem 1.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: var(--font-main);
  color: var(--color-white);
  background: var(--color-navy);
  border-radius: 5px;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: opacity 0.2s;
}

.button-episode:hover {
  opacity: 0.85;
}

.episode-img {
  position: relative;
  overflow: hidden;
}

.episode-img img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.episode-number {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  background: var(--color-navy);
  color: var(--color-beige);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-button);
}

.episode-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.episode-body h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 0.375rem;
  line-height: 1.4;
}

.episode-guest {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-beige);
  margin-bottom: 0.75rem;
}

.episode-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  flex: 1;
}

/* Listen / CTA Section */
.listen {
  background: var(--color-off-white);
  padding: 5rem 1.5rem;
}

.listen-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.listen-inner h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.listen-inner > p {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
}

.listen-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.button-listen {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-navy);
  padding: 0.875rem 1.5rem;
}

.button-listen svg {
  flex-shrink: 0;
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 1.5rem;
  background: var(--color-white);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-sponsor {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.footer-sponsor a {
  color: var(--color-navy);
  text-decoration: none;
  font-weight: 600;
}

.footer-sponsor a:hover {
  text-decoration: underline;
}

.footer-disclaimer {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  opacity: 0.7;
  max-width: 540px;
  margin: 0 auto;
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    padding: 3rem 1.5rem 2.5rem;
    flex-direction: column;
    text-align: center;
  }

  .hero-image {
    flex: none;
    width: 100%;
  }

  .hero-image img {
    height: 240px;
    width: 100%;
  }

  .hero-sub {
    margin-left: auto;
    margin-right: auto;
  }

  .hero h1 {
    font-size: 1.875rem;
  }

  .hero-sub {
    font-size: 1rem;
  }

  .problem-grid {
    grid-template-columns: 1fr;
  }

  .guide-inner {
    flex-direction: column;
    text-align: center;
  }

  .guide-portrait {
    flex: none;
  }

  .topics-grid {
    grid-template-columns: 1fr;
  }

  .episodes-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .listen-links {
    flex-direction: column;
    align-items: center;
  }

  .button-listen {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.625rem;
  }

  .problem h2,
  .guide-content h2,
  .plan-inner h2,
  .listen-inner h2,
  .episodes-header h2 {
    font-size: 1.5rem;
  }

  .logo-img {
    height: 36px;
  }

  .guide-portrait img {
    width: 160px;
    height: 160px;
  }
}